i was only half paying attention to the show tbh, playing balatro at the same time, but i remember an episode saying the captain died
Alas, we were wrong.
collider.com
As SM-33 tells, Rennod was suspecting his crew would start a mutiny, and one of his officers even challenged him for the post of captain. It didn't end well for Rennod, who ended up killed by his lover: "
The captain's concubine betrayed him, stabbing him with his own dagger."
SM-33's story lines up with something that happens a little earlier, in Episode 3, "
Very Interesting, as an Astrogation Problem." Jod and the kids have just broken out of the brig at Port Borgo and made their way out. While the kids eat, Jod explores the Onyx Cinder and finds a skeleton stabbed through the chest hanging on a wall.
That skeleton is probably Tak Rennod himself, in line with what SM-33 reveals about his captain's fate.
so yeah the captains crew mutinied, his concubine kills him, the crew takes the ship but crashes on Al Attin because probably while the ship was allowed to come through, the Supervisor immediately figured out they are pirates and shot them down. Why it didn't send robots out to recover the ship/bodies though is a classic Star Wars Mystery(tm) since you need the crashed ship to let the kids start.